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128 changes: 128 additions & 0 deletions
128
libs/services/src/lib/ftu-data/ftu-data.transformers.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| import { z } from 'zod'; | ||
| import { RAW_CELL_SUMMARIES, RAW_DATASETS, RAW_ILLUSTRATION, RAW_ILLUSTRATIONS_JSONLD } from './ftu-data.model'; | ||
|
|
||
| /** | ||
| * Tries to parse a value as json. Returns the original value if it could not be parsed. | ||
| * | ||
| * @param value Value to parse | ||
| * @returns Parsed json value or the original value | ||
| */ | ||
| export function tryParseJson<R = unknown>(value: unknown): R { | ||
| try { | ||
| if (typeof value === 'string') { | ||
| return JSON.parse(value); | ||
| } | ||
| } catch { | ||
| // Ignore errors | ||
| } | ||
|
|
||
| return value as R; | ||
| } | ||
|
|
||
| /** | ||
| * Tests whether a value is path like | ||
| * | ||
| * @param value Value to test | ||
| * @returns True if the value is path like | ||
| */ | ||
| function isPath(value: unknown): boolean { | ||
| try { | ||
| if (typeof value === 'string') { | ||
| new URL(value, 'https://base.url/'); | ||
| return true; | ||
| } | ||
| } catch { | ||
| // Ignore errors | ||
| } | ||
|
|
||
| return false; | ||
| } | ||
|
|
||
| /** | ||
| * Creates a zod schema for validating input values that accepts either an url, | ||
| * a path, javascript object, or a json encoded string of such an object. | ||
| * | ||
| * @param schema Input object schema | ||
| * @returns A zod type for validating input values | ||
| */ | ||
| function createInputValidation<T extends z.ZodTypeAny>(schema: T) { | ||
| return z.preprocess( | ||
| tryParseJson, | ||
| z.union([ | ||
| z.string().url().optional(), | ||
| z.literal(''), | ||
| z.custom<string>((value) => (isPath(value) ? value : false), 'Invalid path'), | ||
| schema, | ||
| ]), | ||
| ); | ||
| } | ||
|
|
||
| /** | ||
| * Parses a value using the provided schema. Throws an error on parsing failure. | ||
| * | ||
| * @param schema Schema to use for parsing | ||
| * @param value Value to parse | ||
| * @returns The parsed value | ||
| */ | ||
| function parseInput<T extends z.ZodTypeAny>(schema: T, value: unknown): z.infer<T> { | ||
| const result = schema.safeParse(value); | ||
| if (result.success) { | ||
| return result.data; | ||
| } | ||
|
|
||
| throw new TypeError( | ||
| `Invalid input. Expected an url, a path, or a json encoded ${schema.description} object. Received: ${value}`, | ||
| ); | ||
| } | ||
|
|
||
| /** Selected illustration input schema */ | ||
| export const SELECTED_ILLUSTRATION_INPUT = createInputValidation(RAW_ILLUSTRATION).describe('illustration'); | ||
|
|
||
| /** | ||
| * Parses selected illustration input | ||
| * | ||
| * @param value Value to parse | ||
| * @returns Parsed input | ||
| */ | ||
| export function selectedIllustrationInput(value: unknown) { | ||
| return parseInput(SELECTED_ILLUSTRATION_INPUT, value); | ||
| } | ||
|
|
||
| /** Illustrations input schema */ | ||
| export const ILLUSTRATIONS_INPUT = createInputValidation(RAW_ILLUSTRATIONS_JSONLD).describe('illustrations'); | ||
|
|
||
| /** | ||
| * Parses illustrations input | ||
| * | ||
| * @param value Value to parse | ||
| * @returns Parsed input | ||
| */ | ||
| export function illustrationsInput(value: unknown) { | ||
| return parseInput(ILLUSTRATIONS_INPUT, value); | ||
| } | ||
|
|
||
| /** Cell summaries input schema */ | ||
| export const RAW_CELL_SUMMARIES_INPUT = createInputValidation(RAW_CELL_SUMMARIES).describe('cell summaries'); | ||
|
|
||
| /** | ||
| * Parses cell summaries input | ||
| * | ||
| * @param value Value to parse | ||
| * @returns Parsed input | ||
| */ | ||
| export function rawCellSummariesInput(value: unknown) { | ||
| return parseInput(RAW_CELL_SUMMARIES_INPUT, value); | ||
| } | ||
|
|
||
| /** Datasets input schema */ | ||
| export const RAW_DATASETS_INPUT = createInputValidation(RAW_DATASETS).describe('datasets'); | ||
|
|
||
| /** | ||
| * Parses datasets input | ||
| * | ||
| * @param value Value to parse | ||
| * @returns Parsed input | ||
| */ | ||
| export function rawDatasetsInput(value: unknown) { | ||
| return parseInput(RAW_DATASETS_INPUT, value); | ||
| } |
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